Maximum width permitted without a route inspection certification by applicant on file

20 feet

Maximum width permitted for new houses

34 feet

Maximum width permitted for existing houses

40 feet

Maximum width permitted for new tanks

34 feet

Maximum width permitted for existing tanks

40 feet

Height Limits

Maximum height permitted on holidays

16 feet

Maximum height permitted without a route inspection certification by applicant on file

18 feet, 11 inches

Length Limits

Truck or single vehicle

75 feet

Front overhang

25 feet

Rear overhang

30 feet

Maximum length permitted without a route inspection certification by applicant on file

125 feet

Weight Limits for Movement with a Texas Permit

The maximum permit weight for an axle or axle group is based on 650 pounds per inch of tire width or the following axle or axle group weight, whichever is the lesser limit.

Axle Group

Maximum

Single

25,000 pounds

Tandem (two axle)

46,000 pounds

Tridem (three axle)

60,000 pounds

Quadrem (four axle)

70,000 pounds

Quint (five axle)

81,400 pounds

Six or more axles

Determined by MCD based on engineering study of the equipment and measurements.

An axle group must have a minimum spacing of four feet between axles within the group.

Weight may not exceed the manufacturer’s rated tire carrying capacity.

The weight of two or more consecutive axle groups with an axle spacing of less than 12 feet between groups, will be reduced by 2.5% for each foot less than 12 feet.

The weight for an axle group should be distributed equally between axles in the group to not allow more than a 10% weight difference between any two axles in the group.

Trunnion axles may have up to 30,000 pounds per axle if the trunnion configuration has two axles, eight tires per axle, the axles are at least 10-feet wide and there is at least five feet of spacing between the axles, but not more than six feet.

Travel on load-restricted roads requires that the axle and axle group weights be load-zoned. Load-zoned weight is 10% less than the maximum permitted. For example, load-zoned weight on a tandem is 41,400 pounds.

Vehicles and loads with axle, axle group and gross weight that exceed these limits may qualify for a Super Heavy permit.

* Some crane and oil well servicing unit related permit types allow weight in excess of 650 pounds per inch on the steer axle(s).